Carbon-13 CPMAS solid state NMR spectroscopy has been used to investigate the effect of heat on wool. Increases in the unsaturation of the keratin are observed at 225°C. The technique has also been used to show that paramagnetic chromium appears to interact uniformly throughout the bulk of the wool fiber when the fiber is treated with a dichromate solution.
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References
1.
AsakuraT., Carbon-13 NMR Study of Silk Fibroin in Solution, in the Solid State and in Silkworm, in “Proc. 7th Int. Wool Text Res. Conf., Tokyo,’ vol. I, 1985, pp. 354–363.
2.
AsquithR. S.OtterburnM. S., Self-Crosslinking in Keratin under the Influence of Dry Heat, Appl. Polym. Symp.18, 113–125 (1971).
3.
BartleK. D.JonesD. W.L'AmieR., Studies of Wool Proteins by High Resolution Proton Magnetic Resonance Spectroscopy, Appl. Polym. Symp.18, 85–99 (1971).
4.
BrownC. E., Effect of Chemical Modification and CoCl2 Addition on the 13C NMR Spectra of Carnosine as a Solid Powder, J. Am. Chem. Soc.104, 5608–5610 (1982).
5.
DaleB. J.JonesD. W., Proton Magnetic Resonance Study of Conformational Transistions in Hetergeneous Oxidized Wool Proteins, Polymer14, 523–524 (1973).
6.
DaleB. J.JonesD. W., 220-MHz Proton Magnetic Resonance of Homogeneous High Sulphur Fractions of Reduced Wool, Textile Res. J.44, 778–782 (1974).
7.
GanapathyA. N.McDowellC. A., Paramagnetic Doping as an Aid in Obtaining High Resolution 13C NMR Spectra of Biomolecules in the Solid State, J. Am. Chem. Soc.103, 6011–6015 (1981).
8.
GauntJ. F., A study of the Afterchrome Process, J. Soc. Dyers Colour.70, 46–57 (1954).
9.
HartleyF. R., The Chemistry of Chrome Mordanting of Wool, J. Soc. Dyers Colour.85, 66–71 (1969).
10.
InghamP. E., The Pyrolysis of Wool and the Action of Flame Retardants, J. Appl. Polym. Sci.15, 3025–3041 (1971).
11.
LaunerH. F.BlackD., Gases Produced from Wool by Light and Heat, Appl. Polym. Symp.18, 347–352 (1971).
12.
LeederJ. D.RipponJ. A., Changes Induced in the Properties of Wool by Specific Epicuticle Modification, J. Soc. Dyers Colour.101, 11–16 (1985).
13.
MaasdorpA. P. B., The Use of Scanning Electron Microscope and X-ray Analysis to Determine the Distribution of Sulphur and Chromium in Mordant Dyed Keratin Fibres, SAWTRI Technical Report, no. 504, pp. 1–20, 1982.
14.
MaclarenJ. A.MilliganB., “Wool Science, The Chemical Reactivity of the Wool Fiber,’Science Press, Australia, 1981.
15.
MarshallR. C.SourenI.ZahnH., Protein Changes after Short Thermal Treatments of Wool Fabrics, Textile Res. J.53, 792–794 (1983).
16.
MehringM., “High Resolution NMR Spectroscopy in Solids,’Springer-Verlag, Berlin, 1976, p. 138.
17.
MichlikI.KlingerT.SetnickaA.KarkoskaP.BlazejA., Thermal Degradation of Wool, Textile Res. J.40, 484–487 (1970).
18.
MilliganB.HoltL. A.CaldwellJ. B., The Enzymic Hydrolysis of Wool for Amino Acid Analysis, Appl. Polym. Symp.18, 113–125 (1971).
19.
OpellaS. J.FreyM. H., Selection of Non-Protonated Carbon Resonances in Solid State Nuclear Magnetic Resonance, J. Am. Chem. Soc.101, 5854–5856 (1979).
20.
PfefferP. E.GerasimowiczW. V.PiotrowskiE. G., Effect of Paramagnetic Iron on Quantitation in Carbon-13 Cross Polarization Magic Angle Spinning Nuclear Magnetic Resonance Spectrometry of Hetergeneous Environmental Matrices, Anal. Chem.56, 734–741 (1984).
21.
SaitoH.TaberaR.AsakuraT.IwanagaY.ShojiA.OzakiT.AndoI., High Resolution 13C NMR Study of Silk Fibroin in the Solid State by the Cross Polarization Magic Angle Spinning Method, Conformational Characterization of Silk I and Silk II Type Forms of Bombyx mori Fibroin by the Conformation Dependent 13C Chemical Shifts, Macromolecules17, 1405–1412 (1984).
22.
ShimokawaS., Carbon-13 Nuclear Magnetic Relaxation Study of Silk Protein, Biochim. Biophys. Acta747, 177–181 (1983).
23.
WehrliF. W.WirthlinT., “Interpretation of Carbon-13 NMR Spectra,’Heyden, London, 1976.
